"It looks like bitcoin options traders appear to be hedging their bets to the downside ahead of the U.S. election this week," one observer said, noting pricier puts on the CME.
The MOVE index, which measures expected volatility in U.S. Treasury notes, spiked to the highest since January, hinting at tighter financial conditions ahead.
The blame this time can't be laid on macro jitters as stocks are up big again, with the Nasdaq and S&P 500 both more than erasing early August declines.